Question

why can't we have isomers of c3h8 like in the picture​

Answer 1

Answer:

Propane has the chemical formula C3H8

and is also represented as CH3-CH2-CH3

In alkanes, isomerism arises when a particular compound can be represented in the form of both straight chain and branched isomer (by placing alkyl groups as substituents on different carbon atoms, example in butane, pentane etc). The structural formulae of methane, ethane and propane shows that they do not have sufficient number of carbon atoms to exist in the form of branched isomer, that is they can be represented in only one way. In other words, branching is not possible in these compounds.